This topic explains how to use the Exchange Management
Console or the Exchange Management Shell to configure storage
quotas for a mailbox database. The quota limits configured for a
mailbox database are used as the default limit for all mailboxes in
the database. Storage quotas allow administrators to control the
size of mailboxes and manage the growth of mailbox databases.

Note:

Storage quotas can also be configured on a per-mailbox basis.
This allows administrators to specify custom quota limits for
specific mailboxes, while still using the default values configured
for the database for the remaining mailboxes. For detailed steps
about how to configure storage quotas for a mailbox, see How to Configure Storage
Quotas for a Mailbox.

When a mailbox size reaches or exceeds a specified storage quota
limit, Microsoft Exchange Server 2007 sends a
descriptive notification to the mailbox owner.
Exchange 2007 allows you to customize the content of
these notification messages. To learn more about customizing quota
messages, see How to Manage Quota
Messages.

Before You Begin

To perform the following procedures, the account you
use must be delegated the following:

Exchange Server Administrator role and local
Administrators group for the target server

For more information about permissions, delegating
roles, and the rights that are required to administer
Exchange 2007, see Permission
Considerations.

Procedure

To use the Exchange Management
Console to configure storage quotas for a mailbox database

Start the Exchange Management Console.

In the console tree, expand Server
Configuration, and then click Mailbox.

In the result pane, select the server that contains the
mailbox database for which you want to configure storage
quotas.

In the work pane, select the mailbox database for which
you want to configure storage quotas.

In the action pane, under the name of the mailbox
database, click Properties.

In <Mailbox Database Name> Properties,
click the Limits tab.

On the Limits tab, under Storage limits,
complete the following fields:

Issue warning at (KB) Select this check
box and use the corresponding text box to specify the maximum
storage limit in kilobytes (KB) before a warning is issued to the
mailboxes. The value range is from 0 through 2,147,483,647 KB. If a
mailbox size reaches or exceeds the value specified,
Exchange will send a warning message to that mailbox.

Prohibit send at (KB) Select this check
box and use the corresponding text box to specify a prohibit
send limit in KB for mailboxes. The value range is from 0
through 2,147,483,647 KB. If a mailbox size reaches or exceeds the
specified limit, Exchange will prevent that mailbox user from
sending new messages and will display a descriptive error
message.

Prohibit send and receive at
(KB) Select this check box and use the
corresponding text box to specify a prohibit send and
receive limit in KB for mailboxes. The value range is from 0
through 2,147,483,647 KB. If a mailbox size reaches or exceeds the
specified limit, Exchange will prevent that mailbox user from
sending new messages and will not deliver any new messages to the
mailbox. Any messages that are sent to the mailbox will be returned
to the sender with a descriptive error message.

Warning message interval Use this list
to specify a time at which mailboxes in the database are scanned
for compliance with the storage limits configured.
Exchange will send notification messages to all mailboxes for
which the size exceeds one or more of the storage limits. You can
select from one of the predefined intervals in the list or create a
custom schedule.

To create a custom schedule, click Customize to open the
Schedule dialog box. Use the time grid to specify the custom
schedule, and then click OK.

Click OK.

To use the Exchange Management
Shell to configure storage quotas for a mailbox database

Run the following command to set the warning, prohibit
send, and prohibit send and receive limits for the mailbox database
MailboxDatabase1 on Server1 to 200 megabytes (MB),
250 MB, and 280 MB respectively and to configure the
storage limit compliance scan to run between 02:00 and 03:00 on
Wednesdays and Sundays: